As mentioned here last week, the public will get its first look at the San Antonio Bike Share program Friday and Saturday at Main Plaza, as well as the opportunity to purchase half-price yearly memberships for $25. Here are the times:

Demonstrations / Membership sign-up:

 11 a.m.-3 p.m. Friday at Main Plaza

 10 a.m.-2 p.m. Saturday at Main Plaza

The program is expected to launch in the spring of 2011. Yearly memberships are expected to increase to $50 or so, although the city’s office of environmental policy, which operates the city’s bike program, hasn’t determined exact pricing. For example, 24-hour bike rentals are expected to go for $5. Folks from the city as well as the nonprofit S.A. Bike Share will be there to answer questions about the program.

Also, Mayor Julián Castro, City Manager Sheryl Sculley, and others, will formally accept the League of American Bicyclists’ designation of the city as being a bronze level “Bicycle Friendly Community,” at 2:30 p.m. Friday at Main Plaza.